Reacting with emoji to Slack notification does not update the product

Issue Summary

Reacting with emoji to Slack notification does not update the product. According to https://confluence.atlassian.com/confcloud/confluence-cloud-for-slack-956709523.html, reacting with certain emojis should trigger the like:

Use reactions to take action in Confluence when the @confluence bot is invited to a channel:
Add 👍 to a notification or link preview for a page, post, or comment to like the item in Confluence
Add ⭐ to a notification or link preview for a page or post to add it to your saved for later

Steps to Reproduce

1. Connect a Confluence page to a Slack channel and link your account
2. Add a comment to the page
3. Confirm that a Slack notification is triggered
4. Add a thumbsup or star emoji as a reaction
5. Reload the Confluence page

Expected Results

The comment is liked. In Slack side, the following message is shown.

I've liked that comment on :page_facing_up: <page name> for you in Confluence Cloud. To unlike it, just get rid of the :+1: reaction you added to the comment preview.

Actual Results

The comment is not liked. In Slack side, no messages are shown.

Note

This is not happening in all instances. Upon support's testing, some instances did not have this bug reproduced.

Workaround

There is no workaround at the moment